package com.hyts.dess.base.config;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.stereotype.Component;

import java.nio.charset.Charset;

/**
 * Created by weiqingming on 2019/4/26.
 */
@Configuration
public class FastJSONConfiguration {


    private static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";

    /**
     * 配置FastJson方式
     * @return  HttpMessageConverters
     */
    @Bean
    public HttpMessageConverters fastJsonHttpMessageConverters() {
        // 1.定义一个converters转换消息的对象
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        // 2.添加fastjson的配置信息，比如: 是否需要格式化返回的json数据
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setDateFormat(DEFAULT_DATE_FORMAT);
        fastJsonConfig.setCharset(Charset.forName("UTF-8"));
        fastJsonConfig.setSerializerFeatures(
                SerializerFeature.WriteClassName,
                SerializerFeature.WriteMapNullValue,
                SerializerFeature.PrettyFormat,
                SerializerFeature.WriteNullListAsEmpty,
                SerializerFeature.WriteNullStringAsEmpty
        );
        // 3.在converter中添加配置信息
        fastConverter.setFastJsonConfig(fastJsonConfig);
        // 4.返回HttpMessageConverters对象
        return new HttpMessageConverters(fastConverter);
    }

}
